科研之友
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摘要
The on-site I-V measurement of photovoltaic array in a photovoltaic power station can evaluate the current system power generation performance and array status，but the on-site transmission line impedance will cause error in I-V measurement，which not only affects the accuracy of the estimate but also is not beneficial to the policy-making of the photovoltaic power station operation. The article analyzes the influence mechanism of measurement line impedance and environmental parameters on the conventional dynamic capacitance I-V measurement method，and conducts simulation verification. According to the influence mechanism of the error and the equivalent model of the measurement loop，the article proposes a method for measuring the I-V characteristics of a dual-capacitor combination，and develops a prototype for experimental verification. The experimental results indicate that the measurement method can efficaciously eliminate the influence on I- V measurement of photovoltaic array by line distribution parameters and improve the measurement accuracy. ? 2023 Science Press.
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